MESON Chess Problem Database

Problem Display
PID: 47850 (2n1br2/4R1n1/2Np1k1N/5P1R/3KQ1pr/6Pp/4p3/8 w - - 0 1)

Chimedtseren, Sonomun

2nd Comm., Pilchenko-50 JT (Uralski Problemist), 2002

2n1br2/4R1n1/2Np1k1N/5P1R/3KQ1pr/6Pp/4p3/8

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Sg8#
    • 1...Rg8
      • 2.Sxg8#
    • 1...Sxf5+
      • 2.Qxf5#
    • 1...Se6+
      • 2.Qxe6#
    • 1...Sxe7
      • 2.Qxe7#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.Rf7+?
      • 1...Rxf7
        • 2.Sg8#
      • 1...Bxf7!
    • 1.gxh4?
      • threat
        • 2.Sxg4#
      • 1...Sxf5+
        • 2.Qxf5#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Sxe7
        • 2.Qxe7#
      • 1...g3
        • 2.Sg4#
      • 1...Bxh5!
  • Keys
    • 1.Qxg4!
      • threat
        • 2.Qxh4#
      • 1...Rxg4+
        • 2.Sxg4#
      • 1...Sxf5+
        • 2.Rxf5#
      • 1...Se6+
        • 2.Rxe6#
      • 1...Rxh5
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(j);N_GUARD::S(G)
    • R(j);N_GUARD::S(G),XR(j)
    • S(g);CHECK,OGATE,XP(D)::QAR1(C),XS(g)
    • S(g);CHECK,N_GUARD::QAR1(C),XS(g)
    • S(h);OGATE,XR(H)::QAB1(C),XS(h)
    • P(e);N_GUARD::QAB1(C)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • R(j);SBLOCK,XR(H)::S(G)
      • Refutation
        • B(i);XR(H)
    • Try
      • P(A);XR(d)
      • Threat
        • S(G),XP(c)
      • Vars
        • S(g);CHECK,OGATE,XP(D)::QAR1(C),XS(g)
        • S(g);CHECK,N_GUARD::QAR1(C),XS(g)
        • S(h);OGATE,XR(H)::QAB1(C),XS(h)
        • P(c);::S(G)
      • Refutation
        • B(i);XR(E)
  • Actual
    • Q(C);P_SPINQ(C),XP(c)
    • Threat
      • QAB(C),XR(d)
    • Vars
      • R(d);CHECK,XQ(C)::S(G),XR(d)
      • S(g);CHECK,OGATE,XP(D)::R1(E),XS(g)
      • S(g);CHECK,N_GUARD::R1(H),XS(g)
      • R(d);N_PINQ(C),XR(E)::QAB1(C),XS(g)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).